{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Disease", "Chemical"], "input": "Thirteen of these patients experienced pain in the legs and / or back after recovery from anaesthesia ."}
{"Disease": ["pain in the legs and / or back"], "Chemical": []}